Die casting apparatus



My 20, 1958 c. F. GREEN DIE CASTING APPARATUS 2 Sheets-Sheet 1 Filed March 14, 1956 FIGB- INVENT OR. '/ir/s'jf? @rae/7, BY i AQ) ATTORNEYS.

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May 20, 1958 c. F. GREEN DIE CASTING APPARATUS 2 Sheets-Shea?I 2 Filed March 14, 1956 FIG- 7.

INVENTOR.' Wr/e5 if? 'f'/i, BY Q vh we) ATTORNEYS.

United States Patent O This invention relates to die casting machines, and

more particularly to improvements in apparatus known generally in the art as gooseneck devices which are used for discharging fluid materlal, e. g. molten metal, plastics and the like, under pressure in measured amounts. More specifically, the present invention deals with gooseneck apparatus employing a piston which operates in a cylinder of the gooseneck. The cylinder is provided with an inner sleeve which, by means of the present invention, is removable from the cylinder even at elevated temperatures and which, at the same time, is securely mounted within the cylinder in such a way as to deter travel f the molten material upwardly between the interface of the sleeve and the cylinder.

In the conventional gooseneck apparatus, the molten metal to be delivered is maintained in an open-top heated pot and the shot delivering apparatus, including the cylinder of the gooseneck, and most of the gooseneck is submerged inthe molten metal. In making a casting, molten metal from the pot enters the inner bore of a sleeve, which is tightly held in the cylinder, on the upward stroke of the piston and is forced from the cylinder by the downward stroke of the piston through the gooseneck outlet into the line delivering molten metal to the die. Heretofore when the cylinder has been provided with a cylindrical insert or sleeve, it has been force-fitted, threaded, press-fitted or shrink-fitted into the cylinder. Consequently, it has been very difcult to remove such sleeves after the gooseneck has been iniuse. y

In gooseneck apparatus heretofore proposed for` use, difculties have frequently been encountered when the cylindrical sleeve or .the nozzle have required repair or replacement. V

, It is accordingly an object of this invention to provide means for facilitating easy removal and replacement of the cylindrical insertof `gooseneck apparatus.

It isanother object of this invention to provide means for facilitating easy removal and replacement of the nozzle of gooseneck apparatus.

Another object of this invention is to provide means for removing the cylinder insert of a gooseneck 'by the application of a pulling force at points substantially-removed frorn the immersed part of the gooseneck apparatus.

Another object of the present invention is to provide means whereby through a more even distribution of the removing forces acting on the cylindrical insert the likelihood of the cylindrical insert being damaged while being removed is decreased. A still further object is to provide means that prevent the removable parts from becoming bound to the xed parts. Another object of this invention is to provide means whereby the device can be quickly and easily modified to deliver diiferen sized shots of molten metal to the dies. y v

Further objects and advantages 'of the invention, as well as the details of a typical and preferred embodiment thereof, will be understood from the vdetailed de- 2,835,005 Patented May 20, 1958 scription to follow, throughout which reference is made to the accompanying drawings wherein:

Fig. l is a plan view of one specific form of a shot delivery mechanism embodying features of this invention;

Fig. 2 is a sectional view taken as indicated by the lines and arrows II-II which appear in Figs. 1 and 3;

Fig. 3 is a sectional view of the device taken as indicated 'by the lines and arrows III- III which appear in Fig. l;

Fig. 4V is a sectional view of a cylindrical insert of smaller inside diameter than the similar insert shown in Figs. 2 and 3',

Fig. 5 is a sectional view of the device taken as indicated by the lines and arrows V-V which appear in Fig. 3;

Fig. 6 is a sectional view of the device taken as indicated by the lines and arrows VI-VI which appear in Fig. 3; and

Fig. 7 is a sectional View a shot delivery mechanism.

Although specic terms are used in the following description for clarity, these terms are intended to refer only to the structures shown in the drawings, and are not intended to define or limit the scope of the invention.

Referring to the specific form of the invention shown in the drawings, the numeral II designates generally an open top melting pot that is heated to operating temperature bygsteam, electricity, gas or similar means (not shown). for molten metal 12,

of an alternative form of Pot 11 is a reservoir c. g. molten zinc, that is to he measured and conveyed to a die (not shown) by shot` measuring and conveying mechanism indicated generally by the numeral 1 3.

Mechanism 13 comprises a body member 14 that is provided with a vertically disposed cylinder 15. An inlet conduit 16 passes from the upper portion of cylinder and turns downwardly through body mem-ber 14 to terminate in a horizontal, downwardly facing opening 17 beneath the surface of the molten metal 12. At the lower end of cylinder 15 on the opposite wall from the inlet conduit 16 a gooseneck outlet conduit 13 leads from cylinder 15, turns upwardly through body member 14 and then outwardly to broaden into a nozzle receptacle 21. The bottom 22 of cylinder 15 is closed and the top 23 is open and chamfered, body member 14 forming a shoulder 24 at the top 23 of cylinder 15 and then flaring upwardly and outwardly to form a flared portion 25 which has a back 26, and sides 27, 28. The top of sides 27, 2S are formed into rectangular shaped support members 31, 32 that are parallel and spaced apart from each other as shown in Fig. 1.

Gooseneck outlet conduit 18 is provided in body memher 14. To close the elbow 33 in gooseneck 18 a plug .34 is provided. Passage 35 is drilled and plug 34 is welded at 36 to permanently tix the plug 34 to body member 14.l

A cylindrical insert 37 having circular grooves 41, 42' and 43 containing resilient rings 44, 45, and 46, is entered with clearance into cylinder 15, with rings 44, 45,` and 46 forming a sliding iit with the cylinder wall. Inlet port 47 is provided in insert 37 and matches the opening in cylinder 15 for inlet conduit 16, and an outlet port 48 is similarly provided at the lbottom of insert 37 that matches the opening for gooseneck outlet conduit 18. The resilient rings 44 and 45 are positioned on either side of inlet port 47 to deter 4molten metal from creeping into the space 51 between the insert 37 and the cylinder 15. Resilient ring 46 is placed above outlet port 43 to deter molten metal from seeping upwardly to that space 51. At the top of insert 37 there is formed an annular flange 52.

A piston 53 having two resilient rings mounted on its cylindrlca surface, is providedA for reciprocation within insert 37 and its upward limit of travel is above the inlet port 47. Piston 53 is driven by piston rod 54 and operates to eject a measured amount of molten metal 12 from within insert 37v through the gooseneck outlet conduit 18. The top of annular liange 52 is chamfered to permit easy insertion of piston 53 into insert 37 The numeral 55 designates generally a holding-down and insert-removal member having a connecting ring 56 and a horizontal bracket 57 joined by a pair of arms 58. Member 55 holds down the insert 37 during operation f the device and aids in the removal of insert 37 when replacement or substitution of an insert of the same or different inside diameter is desired. Connecting ring 56 has six holes 61 through which cap bolts 62 are threaded into holes 63 in annular flange 52 to fasten member 55 to insert 37. The sides of bracket 57 have holes 65 that admit cap bolts 66 that are threaded into holes 67 in support members 31, 32 of body member 14 to anchor members 55 and insert 37 securely and rigidly in place. Jack screw holes 69 are provided in 'bracket 57 to aid in the removal of insert 37.

At the end of passage nozzle receptacle 21 holds nozzle 68 having circular grooves 71 containing resilient rings 72. These rings 72 permit easy removal of the nozzle 68. Face 73 of nozzle 68 abuts a widened end portion 74 of a conduit 75 that leads to the die. Nozzle 68 may be of any type, male or female. The cylindrical insert 37a of Fig. 4 has the same outside diameter as cylindrical insert 37 of Figs. 2 and 3 but has a smaller inside diameter 76 and will measure a smaller shot of molten metal, with the same or varied stroke.

Preferably, member is made of a metal which is resistant to most molten metal used in die cast work. Clearance is provided between bracket 57 and support members 31, 32 to insure 'that connecting ring 56 abuts annular flange 52, and clearance is provided between shoulder 24 and annular flange 52 to insure that the bottom of insert 37 is ilush with the bottom 22 of cylinder 15. When insert 37 is in place within cylinder 15 there is clearance between the resilient rings 41, 42, 43 and the vertical face of grooves 41, 42, and 43. Similarly, when nozzle 68 is in place within nozzle receptacle 21 there is clearance between resilient rings 72 and the inner face of grooves 71.

In the alternative form of gooseneck apparatus shown in Fig. 7, there is no outlet port 4S, but instead the bottom portion of the cylinder is formed to curve at about right angles and to narrow in inside diameter to conform with the inside diameter of outlet 18.

In operation, molten metal 12 is provided in pot 11 to a level above inlet port 47. The upwand stroke of piston 53 draws molten metal 12 through opening 17, inlet conduit 16, and 37. Then,

31, 32, and the holding-down and insert removal member 55 is lifted upwardly `by conventional means. The upwardly acting forces are transmitted through bracket 57, arms 58, connecting ring 56 and bolts 62 to the annular flange 52 of insert 37. The member 55 operates to distribute the removal forces in an even fashion to flange 52 to prevent damage to insert 37. Resilient rings 44, 45, 46 having deterred molten metal from creeping into the space 51 between insert 37 and cylinder 15, have kept insert 37 easily removable. In removing insert 37, rings 44, 45, 46 compress to permit easy removal of insert 37. Nozzle 68 is similarly easily removed by reason of the compressive action of its resilient rings 72 whenever removal of nozzle 68 becomes necessary or desirable.

It is to be understood that the form of the invention herewith shown and described is to be taken as a preferred embodiment. Various changes may be made in the shape, size and arrangement of parts. For example, equivalent elements may be substituted for those illustrated and described herein, parts may be reversed, and certain features of the invention may be utilized independently of the use of other features, all without departing from the spirit or scope of the invention as defined in the subjoined claims.

Having thus described my invention, I claim:

l. A gooseneck for delivering fluid material to a die casting machine, said gooseneck comprising a body having formed therein a cylinder and having a flared portion extending upwardly from the cylinder, a removable cylindrical insert positioned within the cylinder and arranged for being removed from said cylinder by a force exerted parallel to the central axis of said insert, a piston positioned within said insert in said cylinder, inlet means including inlet ports positioned in said insert and cylinder for admitting fluid material into the insert, a delivery passage including outlet ports positioned in said insert and cylinder through which the fluid material admitted to said insert is discharged from the insert on operation of the piston, insert holddown and removal means for holding said insert in place while delivering said material to the die casting machine and for removing said insert when not delivering said material, means detachably joining said hold-down and removal means to said insert and to said flared portion, and a plurality of resilient rings mounted in the outer wall of said insert and in contact with the inner surface of said cylinder for deterring travel of said fluid material between said outer wall of said insert and said inner surface of said cylinder for allowing removal of said insert, and wherein one of said rings is positioned above said inlet ports and one of said rings is positioned below said inlet ports.

2. A gooseneck as defined in claim l, in which there are two resilient rings, the first being positioned adjacent to and above said inlet ports and the second being positioned adjacent to and above said outlet ports.

3. A gooseneck as defined in claim l, in which there are three resilient rings, the rst being positioned ad-v jacent to and above said inlet ports, the second being positioned adjacent to and below said inlet ports and the third lbeing positioned adjacent to and above said outlet ports.

4. A hold-down and insert removal device in a goose-- neck for delivering Huid material to a die casting machine,-

said gooseneck including a body having formed therein a cylinder, said cylinder being open at the top with a shoulder having an upwardly extending portion, with a removable cylindrical insert positioned within the cylinder, and said insert having an annular flange at the top adjacent said shoulder; said hold-down and insert removal device being connected to said insert and comprising cou- `necting ring means removably aflxed to said annular llange, bracket means removably axed to the top of said upwardly extending portion,

said bracket means to said connecting ring means, means detachably joining said connecting ring means to said annular flange, and means detachably joining said bracket means to the top of said upwardly extending portion, whereby said hold-down and insert removal device is fastened to the top of said upwardly extending portion to hold said insert rigidly in place, and whereby said hold-down and insert removal device is alone unfastened from said top of said upwardly extending portion and removal forces applied thereto to remove said insert from said cylinder.

5. A gooseneck for delivering Huid material to a diel an arm member joiningY casting machine, said gooseneck comprising a body having formed therein a cylinder and having a ilared portion extending upwardly from the cylinder, a removable cylindrical insert positioned within the cylinder, a piston positioned within said insert in said cylinder, means including inlet ports positioned in said insert and cylinder for admitting fluid material into .said insert, a 4delivery passage through which the fluid material is discharged from said insert on operation of the piston, a plurality of resilient rings mounted in the outer wall of said insert and in contact with the inner surface of said cylinder, insert hold-down and removal means for holding said insert in place while delivering said material to the die casting machine and for removing said insert when not delivering said material, means detachably joining said hold-down and removal means to said insert and to said ilared portion, and a plurality of resilient rings mounted on the piston and in contact with the inner wall of said insert for deterring the creeping of said tluid material bef tween said outer wall of said insert and said inner surface of said cylinder for allowing removal of said insert, and wherein one of said rings is positioned above saidV inlet ports and one of said rings is positioned below said inlet ports.

6. A gooseneck for delivering uid material to a die casting machine, said gooseneck comprising a body having formed therein a cylinder and having a ared portion extending upwardly from the cylinder, a removable cylindrical insert within the cylinder, a piston positioned within said insert in said cylinder, means for admitting lluid material into the insert, a delivery passage through which tluid material admitted to said insert is discharged from the insert on operation of the piston, a plurality of resilient rings mounted in the outer wall of said insert and in contact with the inner surface of said cylinder, insert hold-down and removal means for holding said insert in place while delivering said material to the die casting machine and for removing insert when not delivering said material, means detachably joining said hold-down and removal means to said insert and to said flared portion, nozzle means positioned within said delivery passage at the end away from said cylinder, and a plurality of resilient rings mounted in the outer wall of said nozzle means and in contact with the inner surface of said delivery passage, said insert and said inner surface of said cylinder for allowing removal of said insert, and wherein one of said rings is positioned above said inlet ports and one of said rings is positioned below said inlet ports.

, 7. A gooseneckfor delivering uid material to a die casting machine comprising a body member having formed therein a cylinder, said cylinder being closed at the bottom and open at the top and including a shoulder having an upwardly extending portion, a removable cylindrical insert positioned Within the cylinder, said insert having an annular ilange at the top adjacent said shoulder, a piston adapted for reciprocation within said insert in the cylinder, inlet conduit means including an inlet port for admitting fluid material into the insert, a delivery passage through which fluid material admitted through said insert is discharged from the insert on operation of the piston, three resilient rings mounted in the outer wall of said insert and in contact with the inner surface of said cylinder, for deterring travel of said material between the outer wall of said insert and the inner surface of said cylinder, the first ring being positioned adjacent to and above said inlet port, the second ring being positioned adjacent to and below said inlet port and the third ring being positioned adjacent to and above said outlet port, hold-down and insert removal means removably aixed to said annular flange comprising bracket means removably afxed to top of said upwardly extending portion, connecting ring means removably aiTixed to said annular flange, an arm member joining said bracket means to said connecting ring means, means detachably joining said Ibracket means to the top of said upwardly extending portion, and means detachably joining said connecting ring means to said annular flange.

' References Cited in the tile of this patent UNITED STATES PATENTS 1,437,904 Moomaw Dec. 5, 1922 1,470,672 Ambrose Oct. 16, 1923 1,510,042 Clewett Sept. 30, 1924 1,534,225 Lemieux Apr. 21, 1925 1,690,399 Burgess Nov. 6, 1928 1,931,489 During Oct. 24, 1933 2,131,955 Johnson Oct. 4, 1938 2,182,403 Lester Dec. 5, 1939 2,214,638 Kux Sept. 10, 1940 2,479,702 Rood Aug. 23, 1949 FOREIGN PATENTS 145,775 Australia Mar. 7, 1952 1,081,426 France Dec. 20, 1954 373,327 Germany Apr. 10, 1923 

